Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e62c5ff75b92d5cb57df77080a7cb18c1c4e511b973a6333af6bc7d4760a8e7c' 
  AND token = 'E7OLhcsm5tF1KoDXHGAU6q8Ks5IKmFJd6wNBNZVdFTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}